Improvement in dies for making hoes and picks



DAVH) CARR.

vimprovement in Dies for making Hoes a nd Picks. No.123,552. Paten-tedFeb.13,1872.

y- 0 0 Egg.

' the rear end (1.

STATES Nrr DAVID CARR, or ALLEGHENY CITY, PENNSYLVANIA, AssreNoa or Twornrens or HIS RIGHT TO GEO. w. AHL AND THOMAS E; rUsEY, OF

SAME PLACE.

Specification forming part of Letters Patent No. 123,552, dated February 13, 1872.

To whom it may concern:

Be it known that I, DAVID CARR, of the city and County of Allegheny and State of Pennsylvania, have invented a new and useful Improved Machine for Manufacturing Gru b- Hoes, Mattocks, and Picks, of which the following is a specification:

In the drawing, Figure 1 is a front view of a pair of rolls carrying a pair of dies for shaping mattocks from blanks and a pair of dies for plating and finishing mattocks. Fig. 2 is a front view of the same, showing the dies in position for receiving the blank. Figs. 3 and 4 are perspective views of dies for forming picks. Fig. 5 is-a transverse section of a pair of plane-faced dies. Fig. 6 is a transverse section of the pair of dies for forming picks. Fig. 7 is a view of a blank for forming mattocks and picks from. Fig. 8 is a view of a mattock when finished.

My invention consistsin an improved mode of manufacturing grub-hoes, mattocks, and picks by means of dies shaped and used as hereinafter described.

In the drawing, the letters A A represent a pair of rolls, arranged within the standards B B. The top roll A has its bearing a a in loosely-arranged slides, so that the journals of the roll A are governed in their movement from the roll A by set-screws O or their equivalents arranged upon the standardsB B. The

' surfaces of the rolls A A are provided with dovetailed grooves b b, into which tightly fit or are secured the dovetails of either of the dies hereinafter mentioned. The letters D D designate male and female dies for forming mattocks from blanks previously prepared.

The male die D is formed with a longitudinal raised ridge, 0, upon its face. The width of this ridge 0 increases from the front end (I to The female die D is formed with a concave groove, 6, which decreases in depth and width from the front end I; to the rear end b. The bodies of these two eccentric dies are arranged within the dovetailed recesses of the rolls, and operate in connection with each other, they being so placed upon the rolls A A that the ridge 0 coincides with and fits into the groove 0. y

In forming mattocks with these two dies a blank or bar, having an eye formed in it sim ilar to that shown in Fig. 7, is selected and is placed between the dies D D, when a reciprocating or rotary motion is imparted to the rolls by means of any suitable gearing and power. The blank to be operated on to form the ends of the mattocks is held with the end or part to be shaped passed through and between thedies when the dies are in the posi tion shown in Fig. 2. Motion is now given to the rolls, causing the ridge 0 and groove 0 of the dies to seize the blank immediately at or back of the eye, and, as the dies rotate, press the blank in the groove, drawing and shaping the same in conformity with thediesf The blank is now heated to a welding heat and plated with steel to form a cutting-edge by be ing passed between the dies E E. die E has a plane or curved face, and the lower one E is like D, except that the groove is not quite so deep. These dies are eccentric, and are in operation as the dies D D, the effect being to plate the end of the mattock and finishing it at one heat by a succession of passes. The cutter end J of the mattock is formed between the two plane-faced eccentricdies F F,

the die E being removed from the roll and the die F inserted in lieu thereof. the dies F F the cutter end J is plated and formed. The eccentricity of the dies gives the necessary'taper to the points formed between them.

By means of the dies D D and E E grubhoes are formed in a manner similar to the end H of the mattock.

To form a pick I make a die, N, Fig. 6, to be used in connection with the die F. This die N has a groove, g, on one side of its face in which to form the points of the pick. This groove is deepest at its inner edge p, and tap'ers gradually at and terminates at the point 11. on-the face of said die. The pick-blank is passed in the way described, but has to be turned when'half way through, and passed to,

work in the groove that is formed upon the edge of the die N. The upper roll A should be made adjustable, so that it can be raised from or brought near to the lower roll A. This is useful when the blank has to be reduced by successive passes.

The merit the dies possess is that the heavy ridges formed by the dies in the mattocks from The upper Between the eye to the center of the hoe, and the height structed and arranged substantially as deat which they stand in the rolls, afford ample scribed. room for thegproper manipulation of the tools DAVID CARR. While being made.

Having thus described my invention What Witnesses: 1 I claim is WILLIAM P. WRIGHT,

The series of interchangeable dies, con- ROBERT S. RAY. 

